Daler-Rowney System 3 Acrylics are ideal for design projects. They are also ideal for the amateur and professional painter using colour in large quantities. The botles come in wide neck stackable bottles with screw top and flip up lid for easy and accurate dispensing. Only high quality pigments are used in the manufacture with a greater loading than other colour in their class. This gives System 3 real covering power which is one of the greatest attributes a colour can offer. All System 3 colours are highly permanent, water resistant and flexible once dry. They are suitable for outdoor applications.